Atomic structure and electron configurations

Front

What is the atomic number of an element and what does it represent?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

How do you determine the number of neutrons in an atom?

Back

The number of neutrons can be determined by subtracting the atomic number from the mass number (Neutrons = Mass number - Atomic number).

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

What is the maximum number of electrons that can occupy the s sublevel?

Back

The s sublevel can hold a maximum of 2 electrons.

Front

What is the electron configuration of a neutral chlorine atom?

Back

The electron configuration of a neutral chlorine atom (atomic number 17) is 1s² 2s² 2p⁶ 3s² 3p⁵.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are available for bonding.

Front

How many total electrons can the p sublevel hold?

Back

The p sublevel can hold a maximum of 6 electrons.

Front

What is the significance of the d sublevel in electron configurations?

Back

The d sublevel can hold a maximum of 10 electrons and is important for transition metals and their properties.

Front

How many protons, electrons, and neutrons are in an atom of tin-119 (119Sn)?

Back

Tin-119 has 50 protons, 50 electrons, and 69 neutrons.

Front

What is the relationship between atomic number and the number of electrons in a neutral atom?

Back

In a neutral atom, the number of electrons is equal to the atomic number.